of this secondary radiation. In order to study the directionality of this effect, Cerenkov designed the experimental setup illustrated in Figure 2 using a conical mirror that reflected incoming radiation against a photographic plate located above a fluid-filled vessel. Photographs of the reflected light represent cases of ordinary luminescence
A sigil (/ËsÉªdÊÉl/; pl. sigilla or sigils; from Latin sigillum seal) is a symbol used in magic. The term has usually referred to a type of pictorial signature of a demon or other entity; in modern usage, especially in the context of chaos magic, it refers to a symbolic representation of the magician's desired outcome.
Definition of 'vigil'. vigil (vÉªdÊÉªl ) A vigil is a period of time when people remain quietly in a place, especially at night, for example because they are praying or are making a political protest. A prayer vigil is being held in the cathedral in memory of the bishop.